Joker Machine Low Profile Knurled Gas Cap For Harley Featuring a sleek design, this product is crafted entirely from CNC machined billet aluminum. Its ergonomic shape and knurl detail ensure ease of grip and removal, marrying form with function seamlessly. Features: Available in black anodized, chrome, and raw aluminum finishes 3 diameter, 1/4 thick at the edge, and 1/2 thick in the center Made in the USA